i deleted my minecraft cause i wanted a brand new profile but when i tried opening the luncher it wouldnt load anything

Put the summary of the bug you're having here

What I expected to happen was...:
i thought it would download a new minecraft. and stars playing

What actually happened was...:
the launcher finished loading the version but wont start and that applies to every single version

Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. i deleted the minecraft.
3. opened the launcher it starts i click play it finishes loading but the game wont start